Rotation - spinning of Earth on its own axis., Tilt - move or cause to move into a sloping position., Revolution - movement of Earth around the sun., Seasons - each of the four divisions of the year marked by particular weather patterns and daylight hours, resulting from the Earth's changing position with regard to the sun., Solstice - the time or date at which the sun reaches its maximum or minimum declination, marked by the longest and shortest days.,

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